Machine for treating paper board and process



Nov. 1, 1932.

2 Sheets-Sheet 1 Filed Dec. 19,- 1928 E N Q N 31 T4 by, 0 Q i N A\ Q N 1T 0 E L i Q j :Qm Mg I \ELJ] C E11 LLFUIIL O90 A. ABRAMS MACHINE FOR TREATING PAPER'BOARD AND PROCESS Nov. l, 1932.

Filed Dec. 19, 1928 z sheet shqet 2 Patented Nov. 1, 1932 UNITED STATES PATENT orrlcs ALLEN A'BIBAMS, OF 'WA'UEAU, WISCONSIN, ASSIGNOR '10 mATHOH ruin mm COMPANY, OF BOTKSCEILD, WISCONSIN, A CORPORATION 01' WISCONSIN CHINE FOR TREATING PAPER BOARD A171) 230G188 Application filed December 19, .1988. Serial 110. 328,919.

This invention relates to a machine and .process for treating paper board and more closures in the specification and the accom-- panying drawings.

,. 'This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a side elevational view of an apparatus embodying the principles of my invention, showing the driving mechamsm;

Figure 2 is a top plan view of the apparatus' Figure 3 is an enlarged broken sectional view taken substantially on line III-III of Fig. 2;

Figure plan view of a portion 0 ing the doctor devices Figure 5 is a sectional view taken substantially on line VV of Fig. 3; and

Figure 6 is an enlarged elevational view taken substantially on line VIVI of Fig. 4.

The reference numeral 1 indicates a suporting stand provided with split bearings 2 or rotatably supporting a reel 3 of web material, such as paper board. A pan .or trough 4, having mounted therein a perforated roll 5 is positioned adjacent to the supporting stand 1. A shower pipe 6 is mounted above the pan 4 for directing a spray of water or steam against the web of material 7, which passes from the reel 3 under the perforated roll 5. In order to prevent the formation of a pool of water within the pan 4, said pan is provided with a false perforated bottom 8v and a 4 is an enlar ed fragmentary top %the apparatus showdrain pipe 9.

A vat 11, comprising a relatively shallow tank, is provided for containing molten sulphur. Additional sulphur'is run into the vat 11, as required, from a melting tank 12 positioned at one side of the tank 11 and connected thereto by means of a valve controlled pipe 13 heated internally by a steam pipe concentric therewith. The vat 11 is rovided with a plurality of steam lines 14 or melting the sulphur and keeping it at the desired temperature. Said steam lines 14 extend longitudinally of the vat and are inclined upwardly at one end for connection to a steam header 15, said lines being connected at the other end to a drain pipe 16.

A plurality ofrolls 17 are mounted transversely of the vat 11 in bearings 18 sup orted from the side walls of said vat 11. n the drive side of the vat 11, the journals of said rolls 17 are extended throu the bearings 18 to provide extensions 19 (Fig. 5) on which are mounted s rocket gears 20. A chain 21 cooperates with the sprocket gears 20 and at one end passes around a take-up sprocket gear 22 capable of longitudinal adjustment. Idler sprockets 23 arepositioned between adjacent sprocket gears 20 for depressing the up r run of the chain 21 and other idler sprockzt gears 24 are arranged for supporting the lower return run of the. chain 21. Said chain 21 is adapted to be driven through a sprocket gear 25 positioned on the extended end of a lower squeeze roll 26 by means of a belt 27 or other suitable driving means, including a cone pulley 28.

As illustrated in Figure 1, alternate rolls 17 are adapted to be driven in the same direction with the web 7 passing alternately under and over the consecutive rolls as shown in Fig. 3. It will be apparent, however, that the chain 21 can be trained around the sprocket gears 20 and idler sprocket gears 23 in such a manner as to permit the web 7 .totravel be-' low the rolls 17 for its entire passage through the vat 11 or beneath any number of said' rolls and above other of said rolls. In this manner the period of submersion of the web 7 beneath the surface of the molten sulphur may be varied at will.

At the end of the vat 11 adjacent the reel stand 1, there are provided side extension frame members 29'from which is mounted an adjustable guide roll 30 for the web 7, a spring tension roll. 31 for fiansioning the web 7 and a pair of doctor rolls 32 between which the web 7 is adapted to be passed.

At the other end of the vat 11 is positioned a pair of pedestals 33 for supporting the lower squeeze roll 26 and an upper squeeze roll 34. Said upper squeeze roll is journalled in bearing blocks 64 slida-bly mounted in guideways 65 formed in the pedestals 33. The desired pressure between the two squeeze rolls is obtained by means of manually operable tightening bolts 66' threaded through yokes 67 and coiled springs 68 associated therewith and adapted to bear against said bearing blocks 64. The use of the coiled spring tighteners serves to effect the desired compression between the squeeze rolls 26 and v 34, with suflicient flexibility in operation to compensatefor any slight inequalities in the caliper of the paper board, thereby permit- .ting of an absolutely clean surface on the board as it leaves the machine.

Said squeeze rolls 26 and 34 are adapted to be heated to prevent an accumulation of sulphur upon their surfaces and forthis purpose'are connected to steam lines 35 passing through their hollow extended journals. Spur gears 37 are mounted upon said respective journals in intermeshing relation.-

A pair of doctor devices, indicated as a whole by the reference numeral 36, are also adapted to be mounted from the pedestals 33,

as by -means of brackets 38. Each of said devices 36 comprises an upper doctor plate 40 and a lower doctor plate 41 adjustably mounted upon a holder 48. The upper plate 40 is "adapted to be secured through horizontal elongated slots 42 to the upper portion of a vertical flange 43 of the holder 48 by means of bolts 45 (Figure 6). The lower plate 41 is likewise secured through vertically elongated slots 46 to the lower vertical flange portion 47 of the holder 48 by means of bolts 49. The

doctor holders 48 are adjustably secured to the brackets 38 by pins 50 extending through jelongated transverse slots 51 and 52 in'said I brackets 38. Each of said doctor devices 36 istherefore adjustable as a whole in the slots 51 and 52 transversely of the web 7.

In order to compensate for any slight weaving of the web 7 in passing between the doctor devices, coiled springs 63 or the like are arranged under slight compression between lugs 61 and 62 on the vertical web 43 and the outer end of the upper doctor blade 40, respectively, to press the doctor blades inwardly into contact with the edges of the web 7.

Each of the upper plates 40 of the doctor device is provided along its lower edge with a. rectangular recess 53 forming edges 54 and .55, beveled as at 56, for contact with the upper side and edge of the web, respectively. Each of the lower plates 41 is provided with an upper straight edge, beveled as at 57 for a short distance from the end of said plate for contact with the under side of the Web 7.

As best shown in Fig. 6, each outer edge of the web 7 scrapes against the short, vertioal, beveled edge 55 of the upper late 40 and the upper surface of the web against the beveled lower edge 54 of said upper plate 40. The doctor devices thus serve to remove any excess quantities of sulphur upon the edge of the web 7 or adjacent thereto. The doctordevices, furthermore, are set at an acute angle to the line of for a short distance in from its edge scrapes travel of the web 7 so as to aid in defleetthe vat 11, provided with a damper controlled 1 stack 59 through which a forced draft maybe supplied by any suitable means to draw ofl' fumes risin from the molten sulphur.

The sulphur lmpregnated web 7 after leaving the squeeze rolls 26 and 34 and the doctor devices 36, passes on to a platform 60, from which the web may be delivered to a cutter ofany standard type to cut the web into sheets.

The operation of my apparatus is as follows: v

A reel of web material to be impregnated is mounted upon the unreeling stand 1 and the end of the web threaded beneath the perforated roll 5, through the doctor rolls 32, and beneath the tension roll 31 over the guide roll 30.

It has been found that paper board or other fibrous material is sometimes difiicult to impregnate satisfactorily with the sulphur, but that this difiiculty can often be overcome if the paperboard be moistened somewhat. Accordingly it may be necessary to moisten the web material, as by means of a water spray from the shower pipe 6. The perforated bottom 8 of the trough 4, together with the drain pipe 9, prevents the accumulation of a pond of water in case the web 7 .should break or become slack and thus eliminates the difficulty that would arise were the web 7 to fall into a pool of water.

After passing over the guide roll 30, the

web 7 may be passed alternately under andover successive rolls 17 in the tank 11 of molten sulphur. The sul hur is preferabl kept at a temperature of etween 270 an 300 F.,' within which range the sulphur has been found to possess the desired de ee of viscosity. As previously explaine the drive for the rolls 17 is so arran d as to permit the web 7 to be immerse in the molten sulphur bath throughout its entire passage through the vat 11 or for only a part of 1ts passage. It has been found, however, that paper board can be most satisfactoril impregnated with sulphur if the paper oard or the like is alternately exposed to the atmosphere and the bat In assing between the squeeze rolls 26 and 34, w ich are heated, the excess quantities of sulphur picked up by the web 7 are squeezed remove any excess quantities of sul hur that may still remain on or near the e ge of the web after passing through the squeeze rolls. The sulphur in the web will obviously harden rapidly after leavingethe squeeze rolls and will be perfectly set ters. a

The final product made by the process above described is a dense, water-proof sheet having a hard finish. The percentage of sulphur in the impregnated paper board can be varied through a wide range.

I am aware that many changes may be made and numerous detailspf construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

1. An apparatus for impregnatin web materlal, comprising a support or a reel of fibrous web material, a device for moistening the web material, a vat for containing molten sulphur, a plurality of rolls associate with said vat and adapted to be partially immersed in said molten sulphur for guiding the web material into and out of said molten sulphur, a pair of heated squeeze rolls, one of said rolls being driven to draw the web material therebetween and remove the excess quantities of sulphur, and doctor blades arranged for scraping the edges of said web material.

2 In the process of impregnating web matenal with sulphur, the steps of moistening the web material and alternately immersing the web material in molten sulphur and expgsing the treated web material to the atmosp ere.

3. A process for impregnating web material which com rises first moistening the web with water-an then passing said moistened web through molten sulphur.

out of the web and a smooth surface formed thereon. The doctor devices 36 fore reaching the cut-- fibrous I with water and then alternately passing said moistened web through molten sulphur and exposing the web to the atmosphere and re- 4. A process for impregnating web material which com rises first moistening the web with water an then alternately passing said moistened web through molten sulphur and exposing the web to the atmosphere.

5. A process for impregnating web material which comprises first moistening the web 

